Copter: adjust autotune P and D min and max
Copter: autotune bug fix for restarting tuning from suspended state
Copter: autotune restore orig pids if user changes flight mode
Copter: autotune log when limits reached
HAL_SITL: decrease wind with altitude

this prevents JSBSim crash on the runway
AP_Baro: prevent a race condition in the SITL baro driver
autotest: report initial and final altitude in alt hold tests
Plane: changed to 2.75beta4
Copter: OctaQuad H-frame support
Copter: autotune to use 2pos switch only

method of recording state also changed
other code clean-up
pair programmed withe Leonard
Copter: enable AUTOTUNE by default